Researcher at a glance
- Affiliation: Department of Cell Biology, Harvard Medical School; Howard Hughes Medical Institute, Boston, MA
- Orientation: Molecular and cellular neuroscience of internal sensation; identifying vagal sensory neuron types, their receptors and their reflex functions by single-cell genomics, Cre-line genetics and optogenetics
Key contributions
- Senior author of Prescott & Liberles (2022), the Neuron review of vagal sensory biology across the respiratory, cardiovascular and digestive systems.
- His lab produced much of the primary work the review synthesizes: the vagal airway-projection atlas (Prescott et al. 2020), aortic-arch baroreceptor PIEZO1/PIEZO2 sensing (Min et al. 2019; Zeng et al. 2018), and gut vagal circuits for satiety and thirst (Bai et al. 2019; Williams et al. 2016; Zimmerman et al. 2019).
- A molecular-sensory-biology approach to interoception: rather than theorizing inference over a signal, identify the cell, its receptor, its central target and the behaviour it controls.
Key papers
Connections
- Related researchers: Sara L. Prescott, Gary G. Berntson, Sahib S. Khalsa
The wiki’s molecular sensory biologist of the interior. Where A. D. (Bud) Craig mapped the afferent pathway, Barrett and Seth built the inference theory, and Berntson & Khalsa inventoried the circuits, Liberles works one level below all of them — on the identity of the sensory cells themselves: which vagal neuron expresses which receptor, projects where, and controls which reflex. He enters the wiki as senior author of Prescott & Liberles (2022).
The programme
Liberles built his reputation on olfactory receptor biology (TAARs) and then turned the same molecular-genetic toolkit inward, onto the vagus. The method is consistent: use single-cell RNA-seq to enumerate sensory neuron types, build Cre lines to label each, then use optogenetics and cell-specific knockout to assign a function to a cell to a receptor. Much of the review’s content is his own lab’s output — the airway-projection atlas, the baroreceptor PIEZO story, the GLP1R/OXTR gut-satiety and area-postrema-aversion circuits.
The framing consequence for this wiki is the one the review states outright: vagal interoception lags the external senses by decades of mechanistic understanding, and closing that gap is a molecular project, not a theoretical one. Liberles is the wiki’s clearest exponent of the view that the field should be identifying sensors before it models inference over them — the productive form of the caution Interoceptive sensors and Neuropod cells were created to hold.
Placement
The counterpart to Berntson: both write the transduction-and-circuits layer, but Berntson from autonomic psychophysiology and the reciprocal-circuit view, Liberles from cell biology and single-neuron genetics. His work is overwhelmingly mouse, which is exactly the cross-species productivity/limitation this wiki keeps noting — the mechanistic depth exists because the tools are genetic and the animal is a mouse. See Sara L. Prescott, his co-author and the review’s lead.